Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average sea temperature in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
Jaffna, Sri Lanka, measures an average high-temperature of a still warm 29°C (84.2°F) in July, nearly consistent with the preceding month. A modest dip in temperatures to an average of 27.9°C (82.2°F) is observed throughout Jaffna's July nights.Heat index
July's heat index is calculated to be a hot 34°C (93.2°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
The average relative humidity in July is 78%.Rainfall
In Jaffna, in July, during 10.3 rainfall days, 30mm (1.18") of precipitation is typically accumulated. Throughout the year, there are 148.6 rainfall days, and 769mm (30.28") of precipitation is accumulated.Sea temperature
In July, the average sea temperature is 29.3°C (84.7°F).Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.
Daylight
In Jaffna, the average length of the day in July is 12h and 38min.On the first day of July in Jaffna, sunrise is at 05:53 and sunset at 18:34. On the last day of the month, sunrise is at 05:59 and sunset at 18:32 +0530.
Sunshine
The average sunshine in July in Jaffna is 11.3h.UV index
The months with the highest UV index are January through October and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 7 in July translates into this advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Alert! Sand and water increase UV exposure due to their reflective properties.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Jaffna in July?
What is the average humidity in July in Jaffna?
How much does it rain in Jaffna in July?
What is the water temperature in July in Jaffna?
How many hours of daylight does Jaffna have in July?
What time are sunrise and sunset in July in Jaffna?
How long on average sun shines in July in Jaffna?
What is the month with the highest UV index in Jaffna?
What is the UV index reading in July in Jaffna?
Average temperature in July
Jaffna, Sri Lanka
- Average high temperature in July: 29°C
The warmest month (with the highest average high temperature) is April (30.4°C).
The month with the lowest average high temperature is January (26.8°C).
- Average low temperature in July: 27.9°C
The month with the highest average low temperature is May (29°C).
The coldest month (with the lowest average low temperature) is January (25.5°C).
Average pressure in July
Jaffna, Sri Lanka
- Average pressure in July: 1006.2mbar
The month with the highest atmospheric pressure is January (1012.5mbar).
The month with the lowest atmospheric pressure is June (1005.9mbar).
Average wind speed in July
Jaffna, Sri Lanka
- Average wind speed in July: 29.6km/h
The windiest month (with the highest average wind speed) is June (33.8km/h).
The calmest months (with the lowest average wind speed) are March and April (16.7km/h).
Average humidity in July
Jaffna, Sri Lanka
- Average humidity in July: 78%
The months with the highest relative humidity are May, August and September (79%).
The month with the lowest relative humidity is March (75%).
Average rainfall in July
Jaffna, Sri Lanka
- Average rainfall in July: 30mm
The wettest month (with the highest rainfall) is October (191mm).
The driest month (with the least rainfall) is March (13mm).
Average rainfall days in July
Jaffna, Sri Lanka
- Average rainfall days in July: 10.3 days
The month with the highest number of rainy days is October (22.6 days).
The month with the least rainy days is March (5.8 days).
Average sea temperature in July
Jaffna, Sri Lanka
- Average sea temperature in July: 29.3°C
The best month for swimming (with the highest average sea temperature) is April (30.1°C).
The coldest month (with the lowest average sea temperature) is January (26.8°C).
Average daylight in July /
Average sunshine in July
Jaffna, Sri Lanka
- Average daylight in July: 12h and 4min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in July: 11h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in July
Jaffna, Sri Lanka
- Average sunshine days in July: 19.8 days
The month with the most sunshine days is March (23.9 days).
The month with the least sunshine days is November (6.3 days).
Average UV index in July
Jaffna, Sri Lanka
- Average UV index in July: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October and December (UV index 7).
The month with the lowest UV index is November (UV index 6).
Average cloud cover in July
Jaffna, Sri Lanka
- Average cloud cover in July: 29
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 16).
Average visibility in July
Jaffna, Sri Lanka
- Average visibility in July: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Jaffna, Sri Lanka
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